No boost after thermostat change

AdzC · 02-02-2015, 03:29 PM

As above. I have replaced both thermostats today on my 335d and took it out for a test drive.

Car initially felt fine and then I heard a 'pop' like noise and since then have had no boost.

Any ideas please?

KM79 · 02-02-2015, 04:52 PM

Sounds like you've blown off a boost pipe.

bazz780 · 02-02-2015, 05:37 PM

Check coolant level urgently, could be a loose hose that slipped off

LaserPower · 02-02-2015, 05:55 PM

Coolant leaking? Car overheat? If not then it is probably not related.

AdzC · 02-03-2015, 02:49 AM

Cheers for the replies.

The coolant and temperatures all seemed OK although I didn't drove it too far.

Anyway to be honest I don't feel like messing with it anymore so going to get it to the garage for them to look at.

AdzC · 02-04-2015, 06:02 AM

Quick update.

Apparently it was a boost pipe which had popped off. I've no idea which one but car seems to be back to usual again now.

The change of thermostats seems to have worked also.

02-02-2015, 03:29 PM	#1
AdzC Private First Class 13 Rep 152 Posts Drives: E92 335d Join Date: Jul 2012 Location: Lancashire iTrader: (1)	No boost after thermostat change As above. I have replaced both thermostats today on my 335d and took it out for a test drive. Car initially felt fine and then I heard a 'pop' like noise and since then have had no boost. Any ideas please? __________________ Space Grey E92 335d 1998 Yamaha R1 Last edited by AdzC; 02-02-2015 at 03:49 PM..
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02-02-2015, 04:52 PM	#2
KM79 Major 140 Rep 1,445 Posts Drives: 2017 335D Msport Saloon Join Date: Jul 2013 Location: Scotland iTrader: (0)	Sounds like you've blown off a boost pipe.
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02-02-2015, 05:37 PM	#3
bazz780 Captain 70 Rep 810 Posts Drives: E92 330d m sport Join Date: Nov 2011 Location: london iTrader: (0)	Check coolant level urgently, could be a loose hose that slipped off
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02-02-2015, 05:55 PM	#4
LaserPower Private First Class 22 Rep 175 Posts Drives: E90 330xi -> E90 N55 Join Date: Nov 2014 Location: Canada iTrader: (0)	Coolant leaking? Car overheat? If not then it is probably not related.
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02-03-2015, 02:49 AM	#5
AdzC Private First Class 13 Rep 152 Posts Drives: E92 335d Join Date: Jul 2012 Location: Lancashire iTrader: (1)	Cheers for the replies. The coolant and temperatures all seemed OK although I didn't drove it too far. Anyway to be honest I don't feel like messing with it anymore so going to get it to the garage for them to look at.
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02-04-2015, 06:02 AM	#6
AdzC Private First Class 13 Rep 152 Posts Drives: E92 335d Join Date: Jul 2012 Location: Lancashire iTrader: (1)	Quick update. Apparently it was a boost pipe which had popped off. I've no idea which one but car seems to be back to usual again now. The change of thermostats seems to have worked also.
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